If the IO HAWK app displays only the message "Failure", please try the following: 1. Make sure you have the latest version of the app installed 2. Turn off the app completely (close the app in the overview of running apps) 3. Turn off Bluetooth on your smartphone 4. Recalibrate the IO HAWK Cross as described in the manual on page 13 5. Reboot the IO HAWK Cross and wait for the announcement that Bluetooth is ready 6. Now start Bluetooth on the smartphone and wait until the IO HAWK Cross announces that the Bluetooth connection is 7. Open the app and tap "Enter IO HAWK Cross"

The IO HAWK has a very compact footprint, (a little wider than an average person's shoulders) it can easily be used on sidewalks, however check with your local authorities to ensure that it is not illegal to operate your IO HAWK on public sidewalks.

The IO Hawk constantly measures whether it is tilted forward or backward and responds with an acceleration to the front or rear. Just try to balance a broom with the bristles up on her palm. Also, you will be reacting to any tilting of the broom in one direction to accelerate the hand in this direction - so does the IO Hawk principle.